Digibox-AX/A & Digibox-AX/DA - SDI Audio extractors
DigiBox-AX/A and DigiBox-AX/DA are full broadcast specification SDI Audio Extractors. The DigiBox-AX/A allows extraction (de-embedding) and conversion of one AES/EBU signal from the eight potentially embedded within the ancillary data space of an SDI signal. The converted signal will typically be a stereo pair, but could also be two mono signals. The Digibox AX/D can extract both AES/EBU signals from any one of the four groups available within the serial component video ancillary data space.
In addition the Digibox - AX/DA provides the user with one stereo pair selectable from the extracted group. The re-clocked SDI output allows the cascading of a number of Digiboxs AX/A units which would allow extraction and conversion of more audio channels. The Digibox AX/DA re-clocked SDI output allows the cascading of a number of Digibox AX/DA units to extract audio from other groups within the same SDI signal, or provide digital to analogue conversion of the second AES/EBU signal within the selected group.
The audio to be extracted is selected by a rotary switch, and a warning LED indicates if the selected audio/group is not present. A switch is provided to allow the user to mute the audio - AES/EBU outputs.
The AES/EBU audio which is to be extracted must be synchronous with the video and sampled at 48kHz. The AX/A AND AX/DA will handle both 20 and 24-bit audio. The SDI input has automatic cable equalisation for up to 250m of Belden 8281 cable, or similar.
The Digiboxs are complemented by the Digibox AE/A AND AE/D digital and analogue audio embedders,
The unit is housed in a robust steel case and has an integral mains power supply (universal 90 to 250Vac range) with filtered IEC power connector for safe and reliable installation.
Features
- Extracts and converts one stereo pair or Extracts both AES/EBU signals from the group (Digibox AX/DA Only)
- User selection of extracted signal
- Provides analogue output of one selectable stereo pair (Digibox AX/DA Only)
- Re-clocked SDI output
- Handles 20/24-bit synchronous audio
- Audio mute function
- Standard XLR-style audio connectors (Digibox AX/A Only)
- User selectable 18/24dBuFS analogue levels
- Integral mains supply
| Specifications |
| INPUTS |
| Input signal: |
270 Mb/s serial NRZI to SMPTE RP259M and EBU Tech 3267 with digital audio
embedded to SMPTE 272M-AC (synchronous audio at 48kHz) |
| Impedance: |
75 ohm |
| Return Loss: |
>15 dB, 10 MHz to 270 MHz |
| Input Equalization: |
>up to 250m of Belden 8281 or similar |
|
| SDI Output: |
| Output: |
270 Mb/s serial NRZI to SMPTE RP259M and EBU Tech 3267 |
| Impedance: |
75ohm |
| Return Loss: |
>15dB, 10MHz to 270MHz |
| Output Level: |
800mVp-p +/-20mV across 75ohm termination |
|
| Analogue Audio Outputs: |
| Number of Outputs: |
Two (one for each mono or half of the stereo pair within the selected AES/EBU signal) |
| Output: |
Electronically balanced |
| Impedance: |
75 Ohm |
| Output Level: |
18/24dBuFS – user selectable |
| THD: |
0.007% |
| Noise: |
-74dBu (idle channel) |
| Output Connectors: |
XLR-style male |
|
| AES/EBU Digital Audio Outputs (Digibox AX/DA Only): |
| No of outputs: |
Two (one for each AES/EBU signal within the extracted group) |
| Output: |
Balanced ES/EBU |
| Impedance: |
110 Ohm |
|
| Indicators: |
| Tri-colour LED: |
Red - No SDI input
Orange - SDI present - no embedded audio
Green - SDI present - embedded audio detected
|
|
| Controls: |
| AES audio mute |
DIP switch (postion 1) |
| Analogue output level: |
DIP switch (position 2) |
| Audio selection |
Rotary switch, positions 0-7, selecting groups 1-4 and analogue outputs 1-8 |
|
| Installation data: |
| Package: |
Standard Digibox housing, with 75 ohm BNC, and 2 XLR sockets(AX/A Only) one D25 female and two 75 0hm BNC connectors (AX/DA Only)
184 x 103 x 42.4mm. (Upto Four units can be combined using a simple 1U BOXRACK) |
| Weight: |
950g |
| Mains supply: |
90 – 250Vac |
| Consumption: |
<10VA |
|
